<template>
  <!-- <div v-if="authMode === 'password'" class="login-container"> -->
    <el-form
      ref="loginForm"
      :model="loginForm"
      :rules="loginRules"
      class="login-form"
      auto-complete="on"
      label-position="left"
    >
      <h3 class="title">大学生综合素质提升系统</h3>
      <el-form-item prop="username">
        <span class="svg-container">
          <svg-icon icon-class="user" />
        </span>
        <el-input
          v-model="loginForm.username"
          name="username"
          type="text"
          auto-complete="off"
          placeholder="账号"
          @keyup.enter.native="handleLogin"
        />
      </el-form-item>
      <el-form-item prop="password">
        <span class="svg-container">
          <svg-icon icon-class="password" />
        </span>
        <el-input
          :type="pwdType"
          v-model="loginForm.password"
          name="password"
          auto-complete="off"
          placeholder="密码"
          @keyup.enter.native="handleLogin"
        />
        <span class="show-pwd" @click="showPwd">
          <svg-icon icon-class="eye" />
        </span>
      </el-form-item>
      <div class="qrcode-input-box">
        <el-form-item class="qrcode-input" prop="code">
          <span class="svg-container">
            <svg-icon icon-class="yanzhengma" />
          </span>
          <el-input
            v-model="loginForm.code"
            auto-complete="off"
            placeholder="验证码"
            name="code"
            type="text"
            @keyup.enter.native="handleLogin"
          />
        </el-form-item>
        <div class="qrcode-box">
          <i class="el-icon-refresh refresh" title="看不清？点击换一个" @click="freashQRCode" />
          <div class="img-box" v-html="qrcode" />
        </div>
      </div>
      <el-form-item>
        <el-button
          :loading="loading"
          type="primary"
          style="width:100%;"
          @click.native.prevent="handleLogin"
        >登录</el-button>
      </el-form-item>
    </el-form>
  </div>
  <!-- <h2 v-else>跳转中，请稍候。</h2> -->
</template>

<script>
import { isvalidUserId } from "@/utils/validate";
import Cookies from "js-cookie";
// import Cookies from 'js-cookie'

export default {
  name: "Login",
  data() {
    const validateUsername = (rule, value, callback) => {
      if (!isvalidUserId(value)) {
        callback(new Error("请输入正确的账号"));
      } else {
        callback();
      }
    };
    const validatePass = (rule, value, callback) => {
      if (value.length < 6) {
        callback(new Error("密码不能小于6位"));
      } else {
        callback();
      }
    };
    const validateCode = (rule, value, callback) => {
      if (value.length !== 4) {
        callback(new Error("请输入正确的验证码"));
      } else {
        callback();
      }
    };
    return {
      loginForm: {
        username: "",
        password: "",
        code: ""
      },
      loginRules: {
        username: [
          { required: true, trigger: "blur", validator: validateUsername }
        ],
        password: [
          { required: true, trigger: "blur", validator: validatePass }
        ],
        code: [{ required: true, trigger: "blur", validator: validateCode }]
      },
      qrcode: true,
      loading: false,
      pwdType: "password",
      redirect: undefined,
      authMode: "cas"
    };
  },
  watch: {
    $route: {
      handler: function(route) {
        this.redirect = route.query && route.query.redirect;
      },
      immediate: true
    }
  },
  created() {
    this.casLogin();
    this.freashQRCode();
  },
  methods: {
    showPwd() {
      if (this.pwdType === "password") {
        this.pwdType = "";
      } else {
        this.pwdType = "password";
      }
    },
    handleLogin() {
      this.$refs.loginForm.validate(valid => {
        if (valid) {
          this.loading = true;
          this.$store
            .dispatch("Login", this.loginForm)
            .then(res => {
              if (res.code !== 200) {
                this.freashQRCode();
              }
              this.loading = false;
              this.$router.push({ path: this.redirect || "/" });
            })
            .catch(() => {
              this.loading = false;
            });
        } else {
          return false;
        }
      });
    },
    handleCasLogin(st, service) {
      this.$store
        .dispatch("CasLogin", { st, service })
        .then(res => {
          if (res.code === 200) {
            this.$router.push({
              path: this.redirect.replace(/ticket=[0-9A-z-]*/, "") || "/"
            });
          } else {
            window.document.body.innerHTML = `<h2>${res.msg}，即将退出统一认证登录。</h2>`;
            setTimeout(() => {
              this.logout();
            }, 2000);
          }
        })
        .catch(() => {});
    },
    freashQRCode() {
      const random = Math.random();
      const img = document.querySelectorAll('#qrcode-img')
      if (img) {
        img.parentNode.removeChild(img)
      }
      const html = `<img id="qrcode-img" height="40px" style="border-radius: 2px;" src="/api/login/code.zepc?${random}">`;
      this.qrcode = html;
    },
    casLogin() {
      
      const search = window.location.search;
      const st = search.match(/(ticket)=([0-9A-z-_]+)/);
      if (st && st[1] === "ticket") {
        // 获取到ST，请求登录接口
        this.handleCasLogin(st[2], Cookies.get("service"));
      } else {
        const loginUrl = `http://sfrz.zepc.edu.cn/cas/login?service=${window.location.href}`;
        Cookies.set("service", window.location.href);
        window.location.href = loginUrl;
      }
      this.handleCasLogin()
    },
    logout() {
      this.$store.dispatch("LogOut").then(() => {
        location.reload(); // 为了重新实例化vue-router对象 避免bug
      });
    }
  }
};
</script>

<style rel="stylesheet/scss" lang="scss">
$bg: #2d3a4b;
$light_gray: #eee;

/* reset element-ui css */
.login-container {
  .el-input {
    display: inline-block;
    height: 47px;
    width: 85%;
    input {
      background: transparent;
      border: 0px;
      -webkit-appearance: none;
      border-radius: 0px;
      padding: 12px 5px 12px 15px;
      color: $light_gray;
      height: 47px;
      &:-webkit-autofill {
        -webkit-box-shadow: 0 0 0px 1000px $bg inset !important;
        -webkit-text-fill-color: #fff !important;
      }
    }
  }
  .el-form-item {
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(0, 0, 0, 0.1);
    border-radius: 5px;
    color: #454545;
  }
}
</style>

<style rel="stylesheet/scss" lang="scss" scoped>
$bg: #2d3a4b;
$dark_gray: #889aa4;
$light_gray: #eee;
.login-container {
  position: fixed;
  height: 100%;
  width: 100%;
  background-color: $bg;
  .login-form {
    position: absolute;
    left: 0;
    right: 0;
    width: 520px;
    max-width: 100%;
    padding: 35px 35px 15px 35px;
    margin: 120px auto;
  }
  .tips {
    font-size: 14px;
    color: #fff;
    margin-bottom: 10px;
    span {
      &:first-of-type {
        margin-right: 16px;
      }
    }
  }
  .qrcode-input-box {
    display: flex;
    justify-content: space-between;
    .el-input {
      width: calc(100% - 38px);
    }
  }
  .qrcode-input {
    width: calc(100% - 170px);
  }
  .qrcode-box {
    height: 47px;
    display: inline-block;
    vertical-align: middle;
    display: flex;
    align-items: center;
    padding-top: 4px;
    .img-box {
      width: 98px;
    }
    .refresh {
      padding-right: 10px;
      font-size: 22px;
      cursor: pointer;
    }
  }
  .refresh {
    color: #fff;
  }
  .svg-container {
    padding: 6px 5px 6px 15px;
    color: $dark_gray;
    vertical-align: middle;
    width: 30px;
    display: inline-block;
  }
  .title {
    font-size: 24px;
    font-weight: 400;
    color: $light_gray;
    margin: 0px auto 40px auto;
    text-align: center;
    font-weight: bold;
  }
  .show-pwd {
    position: absolute;
    right: 10px;
    top: 7px;
    font-size: 16px;
    color: $dark_gray;
    cursor: pointer;
    user-select: none;
  }
}
</style>
